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@article{AM2_1976__14_136606, author = {Wolfgang Walter}, title = {On a functional equation of {Bellman} in the theory of dynamic programming.}, journal = {Aequationes mathematicae}, pages = {435--444}, publisher = {mathdoc}, volume = {14}, year = {1976}, zbl = {0333.49033}, url = {http://geodesic.mathdoc.fr/item/AM2_1976__14_136606/} }
Wolfgang Walter. On a functional equation of Bellman in the theory of dynamic programming.. Aequationes mathematicae, Tome 14 (1976), pp. 435-444. http://geodesic.mathdoc.fr/item/AM2_1976__14_136606/